Loneliness, otherwise isolation is very bad because so far as you're always alone all the time there are some bad thoughts that would be running through your mind more especially if you're losing bets because sometimes you can run into depression and even make an attempt to take your own life but when you're mixed with people, maybe gamblers and you also see some persons that are also in same category with you, it makes you calm down and move on in times of challenges so basically, not only in gambling but in life, being too isolated is a bad attitude that can ruin ones life in a lifetime so no matter what you're experiencing or going through, loneliness isn't the best option.
Sometimes taking a little bit of time to be on your own can be a good thing as we also need our space from time to time, but if this is something we encounter continuously then it can easily affect us as well, in view of this we need to keep a balance between both postures, and try to spend some time with the company of other people, but also take the time to be on our own as this is the best approach that we can take for our personal development.